Design On 20 | designon20 | Home | Design | Building | Decorating | Accessories | Design Center | Guilderland | Albany | New York State: Design On 20 is an innovative design center welcoming homeowners, business owners and members of the trades. The all encompassing showroom and extensive library offers quality building, decorating and design products. Design On 20 is staffed with designers and associates working to provide the highest level of customer service.